US7005067B2 - Disc-type filtration apparatus including discharge collector internal to pressure vessel and method filtration - Google Patents
Disc-type filtration apparatus including discharge collector internal to pressure vessel and method filtration Download PDFInfo
- Publication number
- US7005067B2 US7005067B2 US10/450,762 US45076203A US7005067B2 US 7005067 B2 US7005067 B2 US 7005067B2 US 45076203 A US45076203 A US 45076203A US 7005067 B2 US7005067 B2 US 7005067B2
- Authority
- US
- United States
- Prior art keywords
- trough
- filtration apparatus
- pressure vessel
- opening
- longitudinal axis
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime, expires
Links
- 238000001914 filtration Methods 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title abstract description 7
- 239000000706 filtrate Substances 0.000 claims description 6
- 238000004891 communication Methods 0.000 claims description 2
- 239000012065 filter cake Substances 0.000 abstract description 12
- 239000007788 liquid Substances 0.000 abstract description 9
- 239000000725 suspension Substances 0.000 description 7
- 238000013459 approach Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 4
- 239000002002 slurry Substances 0.000 description 4
- 230000005484 gravity Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000012217 deletion Methods 0.000 description 1
- 230000037430 deletion Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- -1 for example Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000004537 pulping Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D33/00—Filters with filtering elements which move during the filtering operation
- B01D33/15—Filters with filtering elements which move during the filtering operation with rotary plane filtering surfaces
- B01D33/21—Filters with filtering elements which move during the filtering operation with rotary plane filtering surfaces with hollow filtering discs transversely mounted on a hollow rotary shaft
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D33/00—Filters with filtering elements which move during the filtering operation
- B01D33/44—Regenerating the filter material in the filter
- B01D33/46—Regenerating the filter material in the filter by scrapers, brushes nozzles or the like acting on the cake-side of the filtering element
- B01D33/463—Regenerating the filter material in the filter by scrapers, brushes nozzles or the like acting on the cake-side of the filtering element nozzles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D33/00—Filters with filtering elements which move during the filtering operation
- B01D33/44—Regenerating the filter material in the filter
- B01D33/46—Regenerating the filter material in the filter by scrapers, brushes nozzles or the like acting on the cake-side of the filtering element
- B01D33/466—Regenerating the filter material in the filter by scrapers, brushes nozzles or the like acting on the cake-side of the filtering element scrapers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D33/00—Filters with filtering elements which move during the filtering operation
- B01D33/70—Filters with filtering elements which move during the filtering operation having feed or discharge devices
- B01D33/76—Filters with filtering elements which move during the filtering operation having feed or discharge devices for discharging the filter cake, e.g. chutes
Definitions
- the present invention relates to disc-type filtration apparatus employed for separation of liquid from a suspension or slurry, such as a lime mud. More specifically, the invention relates to a disc-type filtration apparatus housed within a pressure vessel and employing a positive pressure in conjunction with filter discs to effect the liquid separation, as well as a method of filtration.
- Disc-type filtration apparatus are well known, and have been employed for decades.
- such an apparatus employs one or more hollow filter discs, the sidewalls of which discs are either formed of a porous material or define a frame covered with a porous cover, commonly termed a filter cloth.
- the degree of porosity is selected for the suspension to be filtered, considering the viscosity of the liquid component as well as the particle size or sizes of the solid component.
- the discs are usually circumferentially sectored into compartments, are oriented vertically and mutually laterally spaced along a tube extending along a horizontal axis. The interiors of the disc sectors are in communication with the interior of the tube.
- the discs are rotated about the longitudinal axis so as to become coated with the suspension.
- a positive pressure differential is created between the exteriors of the discs and the interiors thereof, to draw much of the liquid component of the suspension coating the disc exteriors into the interiors and significantly reducing the liquid content of the suspension on the disc exteriors to form a “cake.” The cake is then removed from the disc exteriors.
- ClariDisc® Filter has been well accepted by customers, as the solids from this filter (comprising filter cake which has been reslurried), are collected in a sloping outlet trough portion integral with and protruding beyond the cylindrical envelope of a cylindrical pressure vessel portion housing the discs, and discharged from the pressure vessel through a single outlet or multiple outlets.
- This is in contrast to the CAUSTEC® PDWTM filter, which uses a plurality of discharge outlets extending from the exterior of the pressure vessel, one outlet for each disc.
- the CAUSTEC® PDWTM filter is unduly complex and expensive to both build and deploy, due to the use of multiple outlets extending from the cylindrical pressure vessel portion.
- the present invention provides a positive pressure disc-type filtration apparatus including a collection trough internal to a cylindrical pressure vessel housing the filter discs.
- the collection trough for the inventive apparatus is entirely disposed within the cylinder or cylindrical envelope of the pressure vessel and thus may be configured and located without concern for pressure differentials to receive and direct filter cake removed from the discs and then reslurried and sluiced toward the center of the trough using flowing liquid, to be discharged longitudinally centrally through a single outlet extending downwardly from the trough and through the side wall of the pressure vessel cylinder.
- the present invention also encompasses a method of filtration wherein a suspension may be separated within a cylindrical envelope of a pressure vessel into filter cake and filtrate at a plurality of laterally spaced locations and the filter cake collected from the plurality of spaced locations to a single location within the cylindrical envelope for discharge from the pressure vessel.
- FIG. 1 is a transverse sectional view of the filtration apparatus of the present invention
- FIG. 2 is a top view of a portion of the filtration apparatus of the present invention showing the collection trough disposed within the cylinder of the pressure vessel, with the pressure vessel shown in broken lines for clarity;
- FIG. 3 is a side view of a lower portion of the filtration apparatus of the present invention showing the collection trough disposed within the cylinder of the pressure vessel, with the pressure vessel shown in broken lines for clarity;
- FIG. 4 is a side view of a discharge chute and the collection trough.
- filtration apparatus 10 of the present invention includes a pressure vessel 12 having a substantially cylindrical envelope and defined in part by side wall 14 , which substantially defines a cylinder concentric with a longitudinal vessel axis PV. Access hatches 16 , slurry inlet conduit 18 and filter cake (also termed “mud cake”) outlet conduit 20 extend through the side wall 14 . A plurality of filter discs 24 (for example, and in this instance, six) are disposed within pressure vessel 12 .
- the filter discs 24 each include multiple sectors 26 as known in the art, which communicate with the interior of one or more central filtrate discharge tubes 28 (a single tube being employed in this embodiment), an end of which (not shown) also extends through an end of pressure vessel 12 to effectuate removal of the liquid component of the suspension under filtration drawn therefrom under differential pressure through filter cloths disposed on the exteriors of the sectors 26 which collectively form the filter discs 24 .
- the axis DT of the filtrate discharge tube 28 is laterally offset from the longitudinal axis PV of the pressure vessel 12 .
- a disc wash assembly 30 is associated with each filter disc 24 , as is a high pressure shower assembly 32 for disc cleaning, the latter movable by drive assembly 34 in an oscillating fashion through arc 36 as shown in FIG. 1.
- a discharge scraper 38 in the form of doctor blades flanks each filter disc 24 for removal of mud cake from the exterior thereof.
- Trough 40 Disposed within pressure vessel 12 and partially laterally offset and extending below filter discs 24 (see FIG. 1 ) is a mud cake collection trough 40 .
- Trough 40 is elongate and extends beyond the longitudinally outermost filter disc 24 of the row of filter discs 24 .
- Trough 40 includes two inclined bottom walls 42 extending to the side wall 14 of pressure vessel 12 and sloping downwardly away from the horizontal midplane of pressure vessel 12 as well as toward the longitudinal center of the trough 40 , where opening 44 communicates trough 40 with mud cake outlet conduit 20 (FIGS. 1 and 3 ).
- Trough 40 is further configured on its inner side with a plurality of discharge chutes 46 , one substantially parallel to and flanking each side of each filter disc 24 , to receive mud cake removed from the sides of the filter discs 24 by discharge scraper 38 .
- discharge chutes 46 each include an elongated open mouth 48 at an upper extent thereof. Each open mouth 48 is of a length sufficient to receive mud cake falling from the discharge scrapers 38 substantially spanning the radius of the filter discs 24 between central filtrate discharge tube 28 and the filter discs' outer edges.
- the open mouth 48 is desirably of a length which corresponds to a radial length of the filtering area of the sectors 26 (e.g., the distance between the outer radius of the filter discs 24 and the radius of the central filtrate discharge tube 28 ).
- Each discharge chute 46 further includes two side walls 50 oriented substantially parallel to filter discs 24 , and an inclined lower wall 52 extending between side walls 50 and sloping downwardly from mouth 48 and away from the center of pressure vessel 12 toward the side wall 14 thereof.
- the outer extents of discharge chutes 46 comprise openings 54 into the outer collection portion 56 of trough 40 , wherein inclined bottom walls 42 lead to opening 44 .
- Spray heads 58 fed by manifold 60 direct jets or other flows of fluid, such as, for example, water into discharge chutes 46 to prevent accumulation of mud cake on the side walls 50 thereof and to dilute the mud cake scraped off filter discs 24 to enhance sluicing thereof into opening 44 for discharge from pressure vessel 12 through outlet conduit 20 .
- the configuration of the trough 40 and discharge chutes 46 is such that the open mouths 48 are positioned above an intended slurry liquid level during operation of the filter 10 .
- the discharge chutes 46 and trough 40 thus form a barrier separating discharged filter cake from the slurry contained in the pressure vessel 12 .
- Such an arrangement allows the discharge and initial collection of the filter cake to take place entirely within the substantially cylindrical envelope of the pressure vessel 12 in a continuous filtration process.
- the filter 10 includes twelve filter discs 24 it may be desirable to include two troughs 40 , each having an associated opening 40 and each being configured to collect filter cake from six filter discs 24 . It should be noted that the invention is not limited to a single trough 40 for each six filter discs 24 and that the above described embodiments are simply exemplary.
- each trough 40 may be used with each trough 40 being associated with multiple discharge chutes 46 such that the number of outlet conduits 20 formed in the sidewall 14 of the pressure vessel 12 is less than the number of discharge chutes 46 contained therein.
- the number of troughs 40 formed in a given filter 10 may depend on such factors as the number of filter discs 24 present in the filter 10 , the viscosity or flowability of the filter cake, and the minimum allowable angle of the bottom walls 42 which still provides sufficient gravity for collection and removal of the filter cake.
- outlet conduits 20 and associated openings 44 need not be in the longitudinal center of the trough 40 . Rather, the opening 44 may be formed at any longitudinal location along the trough 40 . Thus, for example, a single bottom wall 42 may extend from one longitudinal end of the trough 40 to an opening 44 at the opposing longitudinal end of the trough.
- the present invention may be easily adapted to various plant layouts wherein locating associated piping may be a concern.
- a filter which draws a vacuum through the discharge tube 28 while maintaining an ambient pressure at the exteriors of the filter discs 24 may likewise incorporate a trough 40 such as described above.
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Filtration Of Liquid (AREA)
Abstract
Description
Claims (13)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/450,762 US7005067B2 (en) | 2000-12-12 | 2001-12-06 | Disc-type filtration apparatus including discharge collector internal to pressure vessel and method filtration |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US25521300P | 2000-12-12 | 2000-12-12 | |
PCT/US2001/016987 WO2001095522A1 (en) | 2000-06-06 | 2001-05-23 | Resource allocation method in a satellite diversity system |
US10/450,762 US7005067B2 (en) | 2000-12-12 | 2001-12-06 | Disc-type filtration apparatus including discharge collector internal to pressure vessel and method filtration |
Publications (2)
Publication Number | Publication Date |
---|---|
US20040045913A1 US20040045913A1 (en) | 2004-03-11 |
US7005067B2 true US7005067B2 (en) | 2006-02-28 |
Family
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US10/450,762 Expired - Lifetime US7005067B2 (en) | 2000-12-12 | 2001-12-06 | Disc-type filtration apparatus including discharge collector internal to pressure vessel and method filtration |
Country Status (1)
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US (1) | US7005067B2 (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20050103727A1 (en) * | 2001-04-23 | 2005-05-19 | Flanagan Peter J. | Sequential swinging precoat removal and renewal system, filter so equipped, and method |
US20070221345A1 (en) * | 2004-04-16 | 2007-09-27 | Patrik Lownertz | Method and Device for Washing of Lime Mud |
US20080164222A1 (en) * | 2004-11-25 | 2008-07-10 | Andritz Oy | Method and Apparatus for Thickening Lime Mud in a Disc Filter |
US20100032388A1 (en) * | 2007-02-21 | 2010-02-11 | Hydrotech Veolia Water Systems Aktiebolag | Device and Method for Cleaning a Filter Cloth |
CN103191644A (en) * | 2012-01-09 | 2013-07-10 | 格兰富生物促进联合股份公司 | Filtration apparatus |
US20140374363A1 (en) * | 2012-02-06 | 2014-12-25 | Andritz Oy | Method and apparatus for reducing the thickness of a precoat layer of a disc filter |
US20170157540A1 (en) * | 2015-12-03 | 2017-06-08 | Veolia Water Solutions & Technologies Support | Rotary disc filter |
US11000791B2 (en) * | 2019-03-06 | 2021-05-11 | Veolia Water Solutions & Technologies Support | Rotary disc filter having backwash guides |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7005067B2 (en) * | 2000-12-12 | 2006-02-28 | Gl&V Management Hungary Kft | Disc-type filtration apparatus including discharge collector internal to pressure vessel and method filtration |
DE10342894A1 (en) * | 2003-09-17 | 2005-04-14 | Zf Friedrichshafen Ag | Method for circulating an oil quantity and oil circuit for carrying out the method |
DK2364195T3 (en) * | 2008-10-30 | 2013-03-11 | Gaudfrin | Scraper device for a pressure filtration system |
SE536441C2 (en) * | 2012-06-13 | 2013-11-05 | Metso Paper Sweden Ab | Method and equipment for measuring filter sectors in disc filters |
SE538959C2 (en) * | 2015-07-09 | 2017-03-07 | Valmet Oy | Agitator system for a disc filter |
SE540831C2 (en) * | 2017-06-27 | 2018-11-27 | Valmet Technologies Oy | FILTER DEVICE |
JP7033248B2 (en) * | 2018-11-05 | 2022-03-10 | 株式会社石垣 | Filter press filter cloth cleaning method |
CN112023501B (en) * | 2020-09-08 | 2021-11-19 | 广东四环环保工程股份有限公司 | Horizontal sewage filtering system and sewage filtering method thereof |
Citations (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2079755A (en) | 1935-08-03 | 1937-05-11 | Floyd J Wood | Filter |
US2655265A (en) * | 1949-01-31 | 1953-10-13 | Goslin Birmingham Mfg Company | Continuous rotary pressure or vacuum filter |
US2699872A (en) | 1952-07-10 | 1955-01-18 | William H Kelsey | Pulp-circulating vacuum filter |
US2899066A (en) | 1959-08-11 | Rotary vacuum | ||
US3096278A (en) | 1959-03-09 | 1963-07-02 | Eimco Corp | Scraper assembly for filters |
US3193105A (en) | 1961-02-06 | 1965-07-06 | Improved Machinery Inc | Continuous disc filter |
US3217882A (en) | 1962-12-13 | 1965-11-16 | Carrier Corp | Filter control system and method |
US3252577A (en) | 1961-11-27 | 1966-05-24 | Ametek Inc | Filter |
US3270888A (en) | 1963-08-22 | 1966-09-06 | Ametek Inc | Rotary leaf filter |
US3591009A (en) * | 1969-08-22 | 1971-07-06 | Oscar Luthi | Disc filter having filtrate directing means |
US4056473A (en) | 1976-05-25 | 1977-11-01 | Bjarne Ivar Nilsson | Rotary filter for concentrating fiber suspensions |
US4086168A (en) | 1975-10-16 | 1978-04-25 | Plastic Techniques, Inc. | Disc filter chute liner |
CA1192142A (en) | 1980-09-30 | 1985-08-20 | Alpo Tuomi | Method for thickening of pulp slurry or suspension and disk filter for carrying out the method |
US4929355A (en) * | 1985-02-05 | 1990-05-29 | Ab Hedemora Verkstader | Method and apparatus for the separation of caustic liquor, lime sludge and sludge in a causticizing process |
WO1990010490A1 (en) | 1989-03-13 | 1990-09-20 | Hedemora Ab | Filter for continuous filtration |
US5849202A (en) | 1992-11-06 | 1998-12-15 | Andritz-Patentverwaltungs-Gesellschaft M.B.H. | Rotary disc filtration process having means to prevent settlement of solids |
US6063294A (en) | 1996-10-15 | 2000-05-16 | Baker Hughes Incorporated | Uniform area shower for disc filter |
US6283306B1 (en) * | 1998-02-18 | 2001-09-04 | Harry Nilsson | Rotating filter |
US20040045913A1 (en) * | 2000-12-12 | 2004-03-11 | Flanagan Peter J. | Disc-type filtration apparatus including discharge collector internal to pressure vessel and method of filtration |
-
2001
- 2001-12-06 US US10/450,762 patent/US7005067B2/en not_active Expired - Lifetime
Patent Citations (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2899066A (en) | 1959-08-11 | Rotary vacuum | ||
US2079755A (en) | 1935-08-03 | 1937-05-11 | Floyd J Wood | Filter |
US2655265A (en) * | 1949-01-31 | 1953-10-13 | Goslin Birmingham Mfg Company | Continuous rotary pressure or vacuum filter |
US2699872A (en) | 1952-07-10 | 1955-01-18 | William H Kelsey | Pulp-circulating vacuum filter |
US3096278A (en) | 1959-03-09 | 1963-07-02 | Eimco Corp | Scraper assembly for filters |
US3193105A (en) | 1961-02-06 | 1965-07-06 | Improved Machinery Inc | Continuous disc filter |
US3252577A (en) | 1961-11-27 | 1966-05-24 | Ametek Inc | Filter |
US3217882A (en) | 1962-12-13 | 1965-11-16 | Carrier Corp | Filter control system and method |
US3270888A (en) | 1963-08-22 | 1966-09-06 | Ametek Inc | Rotary leaf filter |
US3591009A (en) * | 1969-08-22 | 1971-07-06 | Oscar Luthi | Disc filter having filtrate directing means |
US4086168A (en) | 1975-10-16 | 1978-04-25 | Plastic Techniques, Inc. | Disc filter chute liner |
US4056473A (en) | 1976-05-25 | 1977-11-01 | Bjarne Ivar Nilsson | Rotary filter for concentrating fiber suspensions |
CA1192142A (en) | 1980-09-30 | 1985-08-20 | Alpo Tuomi | Method for thickening of pulp slurry or suspension and disk filter for carrying out the method |
US4929355A (en) * | 1985-02-05 | 1990-05-29 | Ab Hedemora Verkstader | Method and apparatus for the separation of caustic liquor, lime sludge and sludge in a causticizing process |
WO1990010490A1 (en) | 1989-03-13 | 1990-09-20 | Hedemora Ab | Filter for continuous filtration |
US5849202A (en) | 1992-11-06 | 1998-12-15 | Andritz-Patentverwaltungs-Gesellschaft M.B.H. | Rotary disc filtration process having means to prevent settlement of solids |
US6063294A (en) | 1996-10-15 | 2000-05-16 | Baker Hughes Incorporated | Uniform area shower for disc filter |
US6283306B1 (en) * | 1998-02-18 | 2001-09-04 | Harry Nilsson | Rotating filter |
US20040045913A1 (en) * | 2000-12-12 | 2004-03-11 | Flanagan Peter J. | Disc-type filtration apparatus including discharge collector internal to pressure vessel and method of filtration |
Non-Patent Citations (3)
Title |
---|
EIMCO ClariDisc Filter, Baker Process, 1996, 2 pages. |
International Search Report dated Mar. 26, 2002. |
Kvaemer Pulping, CAUSTEC PDW Filter, Dec. 1996, 8 pages. |
Cited By (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20050103727A1 (en) * | 2001-04-23 | 2005-05-19 | Flanagan Peter J. | Sequential swinging precoat removal and renewal system, filter so equipped, and method |
US20070221345A1 (en) * | 2004-04-16 | 2007-09-27 | Patrik Lownertz | Method and Device for Washing of Lime Mud |
US7686964B2 (en) * | 2004-04-16 | 2010-03-30 | Metso Fiber Karlstad Ab | Method and device for washing of lime mud |
US8002994B2 (en) * | 2004-11-25 | 2011-08-23 | Andritz Oy | Method and apparatus for thickening lime mud in a disc filter |
US20080164222A1 (en) * | 2004-11-25 | 2008-07-10 | Andritz Oy | Method and Apparatus for Thickening Lime Mud in a Disc Filter |
US8101090B2 (en) * | 2007-02-21 | 2012-01-24 | Veolia Water Solutions & Technologies Support | Device and method for cleaning a filter cloth |
US20100032388A1 (en) * | 2007-02-21 | 2010-02-11 | Hydrotech Veolia Water Systems Aktiebolag | Device and Method for Cleaning a Filter Cloth |
US8444862B2 (en) | 2007-02-21 | 2013-05-21 | Veolia Water Solutions & Technologies Support | Device and method for cleaning a filter cloth |
CN103191644A (en) * | 2012-01-09 | 2013-07-10 | 格兰富生物促进联合股份公司 | Filtration apparatus |
US20130175208A1 (en) * | 2012-01-09 | 2013-07-11 | Grundfos Biobooster A/S | Filtration apparatus |
US20140374363A1 (en) * | 2012-02-06 | 2014-12-25 | Andritz Oy | Method and apparatus for reducing the thickness of a precoat layer of a disc filter |
US9259674B2 (en) * | 2012-02-06 | 2016-02-16 | Andritz Oy | Method and apparatus for reducing the thickness of a precoat layer of a disc filter |
US20170157540A1 (en) * | 2015-12-03 | 2017-06-08 | Veolia Water Solutions & Technologies Support | Rotary disc filter |
US10729994B2 (en) * | 2015-12-03 | 2020-08-04 | Veolia Water Solutions & Technologies Support | Rotary disc filter |
US11000791B2 (en) * | 2019-03-06 | 2021-05-11 | Veolia Water Solutions & Technologies Support | Rotary disc filter having backwash guides |
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